Re: [Libguestfs] [PATCH nbdkit] nbd: Hide some state machine debugging behind a debug flag

When running virt-p2v which uses this plugin, the log file is consumed by messages about state machine transitions and so on. In a log file that was shared with me, out of the 135,023 lines in total, 94,653 (70%) were: nbdkit: debug: polling, dir=1 and 18,676 (14%) were: nbdkit: debug: cookie X completed state machine, status 0 This commit changes the logging so these state machine transitions are only printed when you use the debug flag “-D nbd.verbose=1”. I didn't document this flag because it's likely only of use to developers who are reading the code already. There are some debug messages along error paths which are (a) generally useful and (b) did not appear in the log file, so I left those alone. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2083498 Reported-by: Ming Xie --- plugins/nbd/nbd.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-)